Undercover policing in the Netherlands, in law and practice

Police and law enforcement / Special powers of investigation

Undercover policing in the Netherlands, in law and practice


As part of the Parliamentary Committee of Inquiry Investigative Methods, the Research and Documentation Centre studied special investigative methods, in particular the method of infiltration. This study is split into two phases, starting with an inventory of the application of infiltration in practice. This is followed by a study into the effectiveness of infiltration. An important source of information has been the Central Review Committee (CTC) of the Public Prosecutor’s Service. For the first phase, information was gathered from the CTC on 102 infiltration cases in the period 1995-1997. For the second phase, a sample test was taken from these cases, covering 19 cases. These case studies were carried out on the basis of files and interviews with prosecutors, police team leaders and judges involved. Following an extensive description of the legal context, the Special Investigative Powers Act (BOB) and the forms of infiltration as appear in the literature, a description is given of the cases put before CTC for assessment. The issue concludes with a study into the effectiveness of the methods in said case studies. The conclusion is that it appears difficult to make concrete statements on the success or the failure factors.

Publication data

Kruissink, M., Hoorn, A.M. van, Boek, J.L.M., Beenakkers, E.M.Th., Kockelkoren, M.G.J., Verrest, P.A.M., Paulides, G.
Place of publication:
The Hague
Year of publication:
Onderzoek en beleid 177